What is a limitation of the airspeed indicator?

The airspeed indicator relies on the proper function of the pitot/static system to measure airspeed accurately. The pitot tube captures dynamic pressure created by the airflow during flight, while the static port measures the ambient atmospheric pressure. This system works together to provide a reading of the aircraft's airspeed relative to the surrounding air.

If there is a malfunction in either the pitot or static components, it can lead to incorrect airspeed readings, which could have serious implications for flight safety. For example, if the pitot tube were blocked, the airspeed indicator could show a false reading or indicate zero airspeed despite the aircraft's actual movement.

In contrast, the other options have limitations that do not apply universally:

• Measuring in knots is just one of several units for airspeed; the indicator can often display in multiple formats, such as miles per hour or kilometers per hour.

• The airspeed indicator is designed to function at various altitudes, not just at high altitudes, although certain altitudes may introduce additional complexities like changes in air density.

• While the airspeed indicator may be subject to errors during rapidly changing air conditions, such as in a steep turn, it is not inherently inaccurate during standard turns unless specific factors come into play,